====== PlayGround ======

<columns 100% 45% 10% 45%>

  * seznam
  * a
  * b
  * c
    * d
    * e
  * f
    * g
    * h
      * i

<newcolumn>

$\vertarr10cm free<->group.$

<newcolumn>


  * seznam
  * a
  * b
  * c
    * d
    * e
  * f
    * g
    * h
      * i

</columns>